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Design Of PI And Fuzzy Logic Controllers For Grid Connected Inverter With STATCOM

A Study Of Static Compensator (STATCOM) For Compensation Of Reactive Power, Harmonic Distortion Mitigation And Load Balancing In Three Phase Three Wire Nonlinear Load Distribution System. The Proposed Control Algorithm Is Developed Based On Synchronous Reference Frame Theory Using PI And FUZZY Logic Controller. The Obtained Reference Current Signal From Control Algorithm Is Compared In Hysteresis Band Current Controller For Better Switching Of STATCOM. The Performance Of STATCOM With PI And Fuzzy Logic Controller Is Also Analyzed And Compared For DC Voltage Regulation And Harmonic Distortion Mitigation .The Proposed Method Is Provided Effective Compensation For Reactive Power, Harmonic Distortion Mitigation And Load Voltage Balancing. The Simulation Results Are Obtained Using MATLAB/SIMULINK Software.

Design And Performance Analysis Of Solar PV Integrated UPQC

Design And Performance Of A Three-phase Solar PV (photovoltaic) Integrated UPQC (PV-UPQC) Are Presented. The Proposed System Combines Both The Benefits Of Distributed Generation And Active Power Filtering. The Shunt Compensator Of The PV-UPQC Compensates For The Load Current Harmonics And Reactive Power. The Shunt Compensator Is Also Extracting Maximum Power From Solar PV By Operating It At Its Maximum Power Point (MPP). The Series Compensator Compensates For The Grid Side Power Quality Problems Such As Grid Voltage Sags/swells By Injecting Appropriate Voltage In Phase With The Grid Voltage. The Dynamic Performance Of The Proposed System Is Simulated In Matlab-Simulink Under A Nonlinear Load Consisting Of A Bridge Rectifier With Voltage-fed Load.

TCSC Controller Design Using Global Optimization For Stability Analysis Of Single Machine Infinite-Bus Power System

It Presents Modeling, Simulation And Optimal Tuning Of Thyristor Controlled Series Compensator (TCSC) Controller For The Improvement Of Stability Of A Single Machine And Multi Machine Power System. Different Controller Structures Namely Lead-Lag (LL) And A Proportional-integral-derivative PID For TCSC Controller Have Been Proposed And A Comprehensive Assessment Of The Effects Of The Tuned TCSC Controller On Test Power System Have Been Carried Out. The Controller Parameters Have Been Tuned Using Global Optimization (particle Swarm Optimization) For IAE Performance Index Of The Power System. The Proposed GO Based TCSC Controllers Damp Out The Oscillations In The State Variables Of The Single And Multi Machine System. Comparative Of Two Machine(single And Multi) Transient Stability Of System Performance We Are Analyzed.

A Superconducting Magnetic Energy Storage Emulator Battery Supported Dynamic Voltage Restorer

This Work Examines The Use Of Superconducting Magnetic And Battery Hybrid Energy Storage To Compensate Grid Voltage Fluctuations. The Superconducting Magnetic Energy Storage System (SMES) Has Been Emulated By A High-current Inductor To Investigate A System Employing Both SMES And Battery Energy Storage Experimentally. The Design Of The Laboratory Prototype Is Described In Detail, Which Consists Of A Series-connected Three Phase Voltage Source Inverter Used To Regulate Ac Voltage, And Two Bidirectional Dc/dc Converters Used To Control Energy Storage System Charge And Discharge.

Power System Voltage Stability Assessment Through Artificial Neural Network

In Present Days, Electrical Load Demand Is Growing Day By Day And In Order To Meet The Increasing Electrical Load Demand, Power Generating Plants Are Operating Their Plants At Their Maximum Capacity. So There Is Always A Risk Of Voltage Collapse, Which Will Cause The Shutdown Of Entire Power System And Its Block Out, Which Will Cause An Inconvenience To The Customers And Great Losses To The Power Utility Companies. It Is Always A Better Practice To Know About The Weakest Elements In The System And Weakest Buses And Their Maximum Loading Limit. The Objective Of This Paper Is To Evaluate The Reliability Using Artificial Neural Network In Voltage Stability Assessment To Determine Secure/insecure State Of The Power System.

Modeling Impedance Design And Efficiency Analysis Of Quasi-Z Source Module In Cascaded Multilevel Photovoltaic Power System

The Quasi-Z Source Cascaded Multilevel Inverter Presents Attractive Advantages In Application To Photovoltaic Power System. Each PV Panel Connects To An H-bridge QZS Inverter To Form A Power Generation Module. The Distributed Maximum Power Point Tracking And All Modules’ Dc-link Peak Voltage Balance Can Be Achieved. However, It Is The Same With The Conventional CMI That The Second-harmonic Voltage And Current Ripples Exist In Each QZSI Module. It Is Crucial For A QZS-CMI To Design The Reasonable QZS Network Parameters To Limit The Ripples Within A Desired Range. This Project Proposes An Analytic Model To Accurately Calculate The 2ω Voltage And Current Ripples Of Each QZSI Module. A QZS Impedance Design Method Based On The Built Model Is Proposed To Limit The 2ω Ripples Of Dc-link Voltage And Inductor Current. Simulated And Experimental Results Through Using The Designed 1.5-kW Prototype Validate The Proposed Analytic Model And The Design Method. Furthermore, This Paper Analyzes All Of The Operating States For A QZSI Module And Calculates The Power Loss. The Measured Efficiency From The Prototype Verifies The Theoretical Calculation, And The QZS-CMI-based Grid-tie PV Power System Is Tested In Practical.

Predictive Direct Power Control For Three-Phase Grid-Connected Converters

The Predictive DPC Algorithms Based On Predictive Selection Of Voltage-vectors’ Sequences Are Proposed. Within Each Sampling Period, This Method First Selects Two Active Voltage Vectors According To The Angular Information Of The Grid-voltage Vector Or The Space Vector Position Of The Virtual Flux. The Action Time Sequence Is Then Calculated By Minimizing The Cost Function, Which Is Constructed Based On The Errors Between The Predicted And The Reference Values Of Active And Reactive Powers. The Calculated Optimal Time Sequence Is Then Transferred To The Modulation Block, And Consequently, The Switch Signals Are Obtained. By Combining Predictive Approach With DPC Theory, This Algorithm Provides Both High Transient Dynamics And Constant Switching Frequency.

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